When I bought this Rally, I couldn't get it to rev out. I had the original carb ultrasonically cleaned to no avail and I cleaned out the original exhaust with caustic soda. At the same time I bought a new exhaust, a Sito Plus (top one in the picture below) and a new carb. The engine then revved out better but I was not sure what had remedied it, was it the carb or was it the exhaust ?
To be honest, I did suspect it was the carb but, in the 2 years since, I have kept the Sito Plus on thinking that it "must be an improvement on the original."
Anyway, a couple of days ago, I thought I'd put the original exhaust back on and put the main jet back to a 118 (the Sito needed a 117 to make it run OK. Perhaps, with hindsight, this should have warned me that maybe this exhaust was Friday afternoon version).
The scooter is transformed
With the original Piaggio exhaust back on, the scoot now revs out cleanly in all the gears and, just as importantly to me, the problems I'd had with a snatchy clutch have now finally gone (I thought they had gone after replacing the cush drive springs but I was just kidding myself).
I can only conclude that the Sito produced a little too much power for the clutch low down
Just thought I'd share this for anyone else who may have a Sito Plus fitted to a Rally 200.
